Improved pavement



UNITED S'rA'rEs PATENT Orrron.

o. w. STAFFORD, `or snrnnoomoonnnorroor.

IMPRDVED PAVEM ENT.

Specification forming part of Letters Patent No. 63,324, dated March 26, 1867.

by means of staples or clamp and pins, as.A

will be hereinafter more ful,q described.

Figure l represents a ver/tical section of the pavement complete. Fig/2 is a top or plan 4view of the cast-iron base, 4also embracing a view of the top of the bl/ocks or upper surface of the pavement. vFigi 3 shows a section of the pavement complete, on an enlarged scale, showing more fully the manner of taking up or removing a section of the pavement, it being a vertical section of Fig.,2 throughl the line a'. Fig. 4 .is a plan view of the castiron base; showin a different method of connecting the sect' nstogether; Fig. 5 repre'- sents a plan'view of the iron base of a hexagonal pavement, the essential features of which are the same as those already shown'.

Similar letters of reference indicate corresponding parts. y

- A represents the base of 'the pavement, which is made vof cast-iromgsubstantially in the form represented in Fig. 2. A B is the Wood -portion of the pavement.

Thecast-ironbase of the pavement is made sections, of avv convenient size and form,

each section being divided into cells or co1npartm'ents, (marked 13,) as seen in thedrawing.

These sections are secured together byjiron Vclampsor staples, (seen at a in the drawing,) and also by keys or pins, (seen at 11,) or they may be connected by` 4dovetail pins and recesses cast on and in the sections, as seen in the modifications of my invention at 0Figs. 4 and 5. l

The blocks of Wood are cut by machinery to iit the cells, into which they are forced bythe requisite pressure, afterbeing dipped in asphaltu1n, or properly prepared otherwise.` Each block has a shoulder around it, which bears upon the top of the cells, covering about one-half of the thickness of partitions, as seen in Fig. 3. By this arrangement it will be seen that I get the strength of the partitions edgewise, the partitions which form the cells `being so many ribs on the bottom plate, thereby rendering it capable of sustaining an immense weight without fracture.

The blocks are so formed that when they are placed in vthe section, as seen in Figs. l and 3, a tight joint is formed between them. In that portionof Fig. 2 marked F, which represents the upper surface of the pavement, g represents channels, which extend through the blocks and across the pavement, and which are iilled with asphaltum, or some equivalent substance, after the pavement is down.

It will be noticed that the iron sections of the pavement are -halved together, a portion of them being rabbeted on their lower corners, While the others have a llet to match,

as seen at h. VThis is done in such a manner that a single section or more may be taken up for repairs or forputting down gas or water pipe. v

Access is given to the keys b from the up- .per surface through apertures i, which are filled with pitch or some similar substance,

which serve as marks to indicate the position Aof the keys.' Fig. 3;)

(These apertures are seen in In this system ofpaving streets an impor.l tant advantage is gained, and inuch'time and 4interruption of business is saved, from the fact that these' sections are already prepared for laying when brought onto the ground,` and the sections may occupy the space of a square yard ormore. y

Another great advantage is the facility with which the pavement may be, taken up for any of the purposes for which it maybe necessary.

The superiority of the 4.Wood pavement for the horses foot, as well as in regard to the deafening noise when compared 'with th'e'com` mon smooth stone pavement. lis too apparent to require more than a casual notice.

horizontal slots in the vertical flanges, substantially as herein shown and described.

The above specification of my invention signed by me this 29th day of January, 1867.

C. W'. STAFFORD.

Witnesses:

WM. F; MCNAMARA, ALEX. F. ROBERTS. 

